sql - 如何禁用在 Redshift 查询中使用缓存结果？

Question

我对在 Redshift 中测试我的查询的性能感兴趣。

我想禁止查询使用来自先前查询的任何缓存结果。换句话说，我希望查询从头开始运行。是否可以仅在执行我的查询时禁用缓存结果？

我不想禁用整个数据库/所有查询的缓存结果。

Answer 1

SET enable_result_cache_for_session TO OFF;

来自 enable_result_cache_for_session - Amazon Redshift :

Specifies whether to use query results caching. If enable_result_cache_for_session is on, Amazon Redshift checks for a valid, cached copy of the query results when a query is submitted. If a match is found in the result cache, Amazon Redshift uses the cached results and doesn’t execute the query. If enable_result_cache_for_session is off, Amazon Redshift ignores the results cache and executes all queries when they are submitted.